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No. 403,343. Patented May 14, 1889.

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BOILER.

No. 403,343. Patented May 14, 1889.

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N. PETERS, PholoLilhngl-Jphar, Washingmn, no.

UNITED STATES PATENT OFFICE.

KONRAD GAMPER, OF SIELOE, NEAR SOSNOWICE, AND RUDOLF FARKACZ, OF WARSAW,RUSSIA.

BOILER.

SPECIFICATION forming part of Letters Patent No. 403,343, dated May 14,1889.

Application filed November 30, 1888. Serial No. 292,317. (No model.)

To aZZ whom it may concern:

Be it known that we, KONRAD GAMPER, a subject of the Emperor of Russia,residing at Sielce, near Sosnowice, Russia, and RUDOLF FARKAOZ, asubject of the Emperor of Austria, residing at \Varsaw, Russia, haveinvented certain new and useful Improvements in Tubular Boilers, ofwhich the following is a speciflcation.

This invention relates to tubular boilers, into each of the water-tubesof which a firetube is inserted in such manner that the water-space isbetween the internal surfaces of the outer water-tubes and the externalsurfaces of the inner fire-tubes. The heatinggases from the furnace thusact upon the said Water-tubes from without and upon the said fire-tubesfrom within. The water and the fire or flame tubes are each separatelyremovable or withdrawable, the connections between the separate pipesbeing effected through water circulating chambers, into which the tubeends are fastened or secured by collars, bands, flanges, screws, or inany other convenient 0r suitable manner.

In order that our invention may be readily understood, we will fullydescribe the same by reference to the accompanying drawings.

Figure 1 is a vertical longitudinal sectional View, and Fig. 2 atransverse sectional View, of a double tubular boiler constructed according to our invention. Fig. 3 shows on a larger scale than the previousfigures and in vertical longitudinal section the jointing of the waterand fire tubes and water-oirculatin g chambers, and Fig. 4 shows amodified form of bearing or sliding surface, as hereinafter described.

a are the water-tubes; b, the internal firetubes; 0, the water-spacebetween the tubes at and b; d, the water circulating or connectingchambers, 6 being the heating-fines.

f are spherical zone-shaped surfaces formed on the separate parts of thewater-circulating chambers d.

g is an annular packing-ring, being so shaped as to receive thespherical zone-shaped surfaces f, before referred to.

In Fig. 3 the jointing and packing of the chambers cl, one with another,is shown, they being held together by means of bolts h, and a packing orjoint is thus obtained which will remain intact and at the same timeallow of any slight motion of the said chambers d,

6, preferably secured by bolts a, and the flretubes are preferablysecured in the outer side openings by means of threaded collars b, asshown clearly.

In some cases, instead of the surfaces f of the water-circulatingchambers d being of spherical-zone form, as shown in Fig. 3, the saidsurfaces may be shaped, as shown at Fig. 4, of cylindrical formation,and Where found desirable several fire-tubes, instead of only one, asshown, may be introduced into each water-tube.

Having now particularly described and ascertained the nature of our saidinvention and in what manner the same is to be performed, We declarethat what we claim is A tubular boiler comprising the internalfiretubes, the external inclosing water-tubes, and the separatewater-circulatin g chambers, each pair of fire and water tubes having apair of separate chambers secured to their opposite ends, the fire tubesextending completely through the chambers and removably secured to thesame, the water-tubes opening into the front sides of the chambers andremovably secured thereto, each of said chambers being formed integraland having openings in its top and bottom formed by flanges, saidchambers being movably secured together with their upper and loweropenings registering, and packing-rings interposed between the adjoiningedges of said flanges, as set forth.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

KONRAD GAMPER. RUDOLF FARKAOZ. Witnesses:

CHRISTIAN BRINKMANN, KAJEIAN FIODOWSKL

